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COMBUSTION CHAMBER ASSEMBLY - INSPECTION/CHECK
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TASK 72-42-00-290-041
Borescope Inspection of the Combustion Chamber Liners and Dome Area
1. Reason for the Job
__________________
NOTE : Inspection of the combustion chamber is limited to the areas that can
____ be seen with a rigid borescope, at the 1, 3, 6 and 10 o'clock borescope ports, and at the 2 spark igniter ports.
R The borescope ports at the 1, 3, 6, and 10 o'clock positions are
R located immediately in front of the fuel manifold. These ports and the 2 spark igniter ports permit the borescope inspection of the combustion chamber and the HPT nozzle.
2. Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific protective caps
No specific warning notice
No specific access platform 1 m (3 ft. 3 in.)
No specific Torque Wrench : range 36.00 to 220.00 lbf.in
(0.40 to 2.60 m.daN)
856A1320 1 BORESCOPE KIT
856A1322 1 BORESCOPE - LIGHT SOURCE SET
856A1323 1 MONITOR, RESOLUTION BORESCOPE
B. Consumable Materials
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
R Material No. CP2101 USA MIL-T-5544
R graphite grease (Ref. 70-30-00)
R Material No. CP2619 *
R Never Seez-Pure Nickel, Special (Ref. 70-30-00)
Material No. CP8001 *
lockwire 0.8 mm dia. (Ref. 70-30-00)
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C. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
71-13-00-010-040 Opening of the Fan Cowl Doors 71-13-00-410-040 Closing of the Fan Cowl Doors 72-00-00-200-025 Over-Serviceable-Limit Extensions 72-42-00-290-006 Borescope Inspection of the Outer Side of the
Combustion Chamber Outer Liners 73-11-40-790-002 Leak Check of the Fuel Nozzles 74-21-30-000-002 Removal of the Spark Igniter 74-21-30-400-002 Installation of the Spark Igniter 78-30-00-081-041 Make the Thrust Reverser Serviceable after
Maintenance 78-30-00-481-041 Make the Thrust Reverser Unserviceable for
Maintenance 78-36-00-010-040 Opening of the Thrust Reverser Doors 78-36-00-410-040 Closing of the Thrust Reverser Doors NTM 720000 72-42-00-991-301 Fig. 601 72-42-00-991-302 Fig. 602 72-42-00-991-303 Fig. 603 72-42-00-991-305 Fig. 604 72-42-00-991-306 Fig. 605
3. Job Set-up
__________
Subtask 72-42-00-941-053
A. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:
(a) Put a warning notice to tell persons not to start the engine.
(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) On the overhead maintenance panel 50VU:
(a) Make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.
(b) Put a warning notice to tell persons not to energize the FADEC 1(2).
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Subtask 72-42-00-010-058
B. Get Access
(1) Open the fan cowl doors: (Ref. TASK 71-13-00-010-040) FOR 1000EM1 437AL, 438AR FOR 1000EM2 447AL, 448AR
R (2) Put the access platform in position.
Subtask 72-42-00-040-053
C. Make the thrust reverser unserviceable for maintenance (Ref. TASK 78-30-00-481-041)
Subtask 72-42-00-010-059
D. Open the thrust reverser doors: (Ref. TASK 78-36-00-010-040)
FOR 1000EM1
451AL, 452AR
FOR 1000EM2
461AL, 462AR
4. Procedure
_________
(Ref. Fig. 601/TASK 72-42-00-991-301, 602/TASK 72-42-00-991-302, 603/TASK
72-42-00-991-303, 604/TASK 72-42-00-991-305, 605/TASK 72-42-00-991-306)
Subtask 72-42-00-010-060
A. Remove parts before borescope inspection.
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